linux-kernel - Re: [PATCH v2 00/34] Qualcomm video encoder and decoder driver

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Date: Mon, 18 Dec 2023 14:36:43 +0000
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>,
 linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 stanimir.k.varbanov@...il.com, quic_vgarodia@...cinc.com, agross@...nel.org,
 andersson@...nel.org, konrad.dybcio@...aro.org, mchehab@...nel.org
Cc: linux-arm-msm@...r.kernel.org, quic_abhinavk@...cinc.com
Subject: Re: [PATCH v2 00/34] Qualcomm video encoder and decoder driver

On 18/12/2023 11:31, Dikshita Agarwal wrote:

> Static tools like checkpatch, smatch, dt_binding_check, sparse and Coccinelle
> run successfully with this driver.
> 
>   The output of v4l2-compliance test looks like:
> 
> v4l2-compliance SHA: not available, 64 bits
>   
> Cannot open device /dev/vido0, exiting.
> root@...uarm64:/usr/bin# ./v4l2-compliance -d /dev/video0
> v4l2-compliance SHA: not available, 64 bits
>   
> Compliance test for iris_driver device /dev/video0:
>   
> Driver Info:
>          Driver name      : iris_driver
>          Card type        : iris_decoder
>          Bus info         : platform:iris_bus
>          Driver version   : 6.6.0
>          Capabilities     : 0x84204000
>                  Video Memory-to-Memory Multiplanar
>                  Streaming
>                  Extended Pix Format
>                  Device Capabilities
>          Device Caps      : 0x04204000
>                  Video Memory-to-Memory Multiplanar
>                  Streaming
>                  Extended Pix Format

Good to see some code sharing, is there no way to facilitate the new 
code in existing venus ?

I applied your patches to -stable and was happy to find they didn't 
break venus on rb5, at least for the superficial test I did [1]. The 
names you export here look odd though.

"Driver name" and "Cart Type" should be something like "qcom-iris" and 
"Qualcomm Iris video decoder"

v4l2-compliance -d /dev/video15
v4l2-compliance 1.24.1, 64 bits, 64-bit time_t

Compliance test for qcom-venus device /dev/video15:

Driver Info:
         Driver name      : qcom-venus
         Card type        : Qualcomm Venus video encoder
         Bus info         : platform:qcom-venus
         Driver version   : 6.7.0
         Capabilities     : 0x84204000
                 Video Memory-to-Memory Multiplanar
                 Streaming
                 Extended Pix Format
                 Device Capabilities
         Device Caps      : 0x04204000
                 Video Memory-to-Memory Multiplanar
                 Streaming
                 Extended Pix Format
         Detected Stateful Encoder
  [1] 
https://file-examples.com/index.php/sample-video-files/sample-mp4-files/

ffplay -loglevel debug -codec:video h264_v4l2m2m -i sample-30s.mp4

> Driver Info:
>          Driver name      : iris_driver
>          Card type        : iris_encoder

Same comment on normalising names wrt to venus.

---
bod